body {
    margin: 0;
    font-family: Arial, sans-serif;
    font-size: 90%;
}

#header {
    background-color: lightgray;
    padding-top: 1em;
}

#header h1 {
    font-size: 2em;
    margin: 0 0.5em;
}

#nav {
    background-color: gainsboro;
    margin-top: 1em;
    padding: 0.5em 1em;
}

#nav ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

#nav ul li {
    display: inline-block;
    margin: 0;
    margin-right: 1em;
}

#nav a {
    color: inherit;
}

#content {
    margin: 0 1em;
}

th, td {
    border: solid 1px black;
}

th {
    text-align: left;
}

